1、 TECHNICAL REPORT IEC TR 60071-4 First edition2004-06 Insulation co-ordination Part 4:Computational guide to insulation co-ordination and modelling of electrical networks Reference number IEC/TR 60071-4:2004(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED
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8、9 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICAL REPORT IECTR 60071-4 First edition2004-06 Insulation co-ordination Part 4:Computational guide to insulation co-ordination and modelling of electrica
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11、LOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TR 60071-4 IEC:2004(E)CONTENTS FOREWORD.7 1 Scope and object.9 2 Normative references.9 3 Terms and definitions.9 4 List of symbols and acronyms.12 5 Types of overvoltages.12 6 Types of studies.13 6.1 Temporary overvoltages(
12、TOV).14 6.2 Slow-front overvoltages(SFO).14 6.3 Fast-front overvoltages(FFO).15 6.4 Very-fast-front overvoltages(VFFO).15 7 Representation of network components and numerical considerations.15 7.1 General.15 7.2 Numerical considerations.15 7.3 Representation of overhead lines and underground cables.
13、18 7.4 Representation of network components when computing temporary overvoltages.19 7.5 Representation of network components when computing slow-front overvoltages.25 7.6 Representation of network components when computing fast-front transients.30 7.7 Representation of network components when compu
14、ting very-fast-front overvoltages.42 8 Temporary overvoltages analysis.44 8.1 General.44 8.2 Fast estimate of temporary overvoltages.45 8.3 Detailed calculation of temporary overvoltages 2,9.45 9 Slow-front overvoltages analysis.48 9.1 General.48 9.2 Fast methodology to conduct SFO studies.48 9.3 Me
15、thod to be employed.49 9.4 Guideline to conduct detailed statistical methods.49 10 Fast-front overvoltages analysis.52 10.1 General.52 10.2 Guideline to apply statistical and semi-statistical methods.53 11 Very-fast-front overvoltage analysis.58 11.1 General.58 11.2 Goal of the studies to be perform
16、ed.58 11.3 Origin and typology of VFFO.58 11.4 Guideline to perform studies.60 12 Test cases.60 12.1 General.60 12.2 Case 1:TOV on a large transmission system including long lines.60 12.3 Case 2(SFO)Energization of a 500 kV line.68 12.4 Case 3(FFO)Lightning protection of a 500 kV GIS substation.73 12.5 Case 4(VFFO)Simulation of transients in a 765 kV GIS 51.80 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TR 60071-4 IEC:2004(E)3
